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. Author manuscript; available in PMC: 2020 Jul 17.
Published in final edited form as: Water Res. 2018 Apr 25;140:200–210. doi: 10.1016/j.watres.2018.04.055

Table 5:

Zero-inflated poisson regression results comparing F+ log10 PFU/L measurements with water quality and recreational area parameter data.

Recreation Area Site n Fitted Model R2 Significant Covariates (p < 0.05)
Adjusted Not Adjusted
Edgewater C 64 0.231 0.231 pH, conductivity, turbidity, water temperature, DOC, rainfall (72hr, 48hr, 24hr), dog counts, air temperature, wind direction, wave height
H 63 0.419 0.365 DO, turbidity, rainfall (72hr), human count, dog count, air temperature, wave height
R 65 0.612 0.591 pH, conductivity, DO, turbidity, rainfall (72hr, 48hr, 24hr), DOC, UV_254, air temperature, wind direction
Grant Park C 66 0.356 0.349 pH, conductivity, DO, turbidity, water temperature, DOC, rainfall (72hr, 48hr), UV_254, human count, wind direction, wave height
H 65 0.115 0.110 pH, DO, rainfall (72hr, 48hr), DOC, UV_254, bird count, wind direction
R 64 0.388 0.355 pH, conductivity, DO, turbidity, water temperature, DOC, rainfall (72hr, 48hr), UV_254, air temperature, wind direction
Washington Park C 53 0.228 0.261 pH, DO, turbidity, DOC, UV_254, dog count, wind direction
H 55 0.456 0.424 conductivity, rainfall (24hr), dog count
R 55 0.614 0.609 pH, conductivity, turbidity, DOC, rainfall (72hr, 48hr, 24hr), UV_254, wind direction

Parameters in bold indicate a negative correlation with respective indicator. Sites include composite (C), historic ((H), and river (R). Parameter abbreviations include dissolved organic carbon (DOC) and UV_254 (ultraviolet absorption at 254 nm).